If you are using the Windows Media SDK, you will probably know the sample source named avitowmv . This is an example that shows how to encode .asf files using the WMF SDK. Unfortunately, the sample doesn t not support compressed AVI video files.-If you are using the Windows Media SDK, you will probably know the sample source named　avitowmv . This is an example that shows how to encode .asf files using the WMF SDK. Unfortunately, the sample doesn t not support compressed AVI video files.